The function of the portable sampling system is automatic, but sample pump and valve can be controlled also manually. In the case of a power failure or if the temperature (pump, lines, sample cell) is below setting, the automatic 3-way valve switches sample gas to zero gas to prevent condensation. Sample pump cannot be switched on before all temperatures have reached the setting. In addition, the zero calibration of the FTIR gas analyzer can be done automatically with the portable sampling system. As an option, the sampling system can be equipped with a sample probe and/or heated lines. The maximum length for the heated line is 19 m + 1 m with 230 VAC and 9 m + 1 m with 115 VAC power supply. There is also an optional integrated O2 sensor that supplements the  capabilities of the FTIR gas analyzers.